Command Avatar-2 points
The entity known as Zerky flies over the earth-awkwardly, one might add-rambling about and attempting to stuff sharks into seagulls and the like, contemplating making square pegs triangular so they would fit even worse into round holes. As he had this thought he ran into the Crondins-literally. He ran into one while he wasn't paying attention at high speeds. Fortunately for Zerky he was a divine fragment so was naturally resistant to such blunt force trauma, but the whole affair ended badly for the poor Crondin who now resembled meatloaf.
That said, his fellows were most impressed with this act. Not only had Zerky demonstrated great power and (seeming) ability, but he had managed to off the most annoying member of the tribe he had stumbled upon. Promptly celebrations were held and much free food ensued; Zerky found these parties somewhat bland until he taught them how to ferment their grains, then slowly but surely over months all hell broke loose. The tribe nearly wiped itself out due to getting chronically drunk, but eh, it was one tribe, and Zerky had gotten free food to his heart's content out of the deal. The other neighbor tribes took care not to befall the fate of their neighbors... but they were still mightily interested in this fermenting process.
With newfound respect, Zerky comes to a sort of an informal divine prophet, a living deity among the tribes, though one that quickly becomes refered to as "Zerky, bringer of drunkenness and disorder," to the point that the word "Zerky" comes to mean drunkard in their tongues. Still, his advice is still sought, particularily as the Crondin have diverging opinions on succession of titles and inheritance.
Zerky doesn't think very long on the subject, simply stating that if the older siblings are older and came first, their word should be law. Of course many eldest sons take this advice to heart, but this isn't a universally shared opinion, meeting some resistance. The proponants pointed out that a divine being gave them this advice. Opponants pointed out that this divine being had taught them to be drunken slobs.
Thus, consensus was not achieved, but many of the older brothers said "fine, be that way!" and banded together, forming a new Order, the Elder Rights. Their job is to be useful, helpful, and productive in their labor given to any tribes, so long as they adopt an "eldest child makes the rules" rule. Opponents again jeered the whole proposal, mocking them with "Oh yeah? Or what?" When Zerky was asked this by a particularily pesky young Crondin, the dragon-thing became irritated until he grabbed the nearest heavy object he could find, a stone tablet, and whacked the annoying lizard upside the head. This was taken as a sign; soon the Elder Rights Order would attempt to beat younger brothers over the head with stone tablets inscribed with lengthy treatises on why younger brothers should do what they're told. This later develops into a tradtion for the Elders; beat little brothers up with books upside the head whenever they get uppity. Unfortunately (in the eyes of oldest brothers everywhere) this norm is not universally adopted by the Crondin, but to everyone else they're too busy getting annoyed and rubbing sore heads.